CVE-2026-56787
MediumCVSS 6.5Exploitation Probability (EPSS)
Low risk22th percentile — higher than 22% of all known CVEs
Summary
An off-by-one out-of-bounds read vulnerability in RTKLIB through version 2.4.3 in the decode_ssr3 function at src/rtcm3.c:1446 allows remote attackers to trigger a global buffer overflow via crafted RTCM3 SSR messages with attacker-controlled signal mode fields.
Risk Assessment
Remote attackers can cause denial of service or crash RTKLIB rovers and CORS servers by sending malicious SSR correction streams over NTRIP or serial connections.
Recommendation
Update RTKLIB to the latest version containing the fix. If not possible, restrict access to NTRIP streams and serial connections to trusted sources only.
Original NVD description (English source)
RTKLIB through 2.4.3 contains an off-by-one out-of-bounds read vulnerability in the decode_ssr3 function at src/rtcm3.c:1446 that allows remote attackers to trigger a global buffer overflow via crafted RTCM3 SSR messages with attacker-controlled signal mode fields. Remote attackers can exploit this vulnerability by sending malicious SSR correction streams over NTRIP or serial connections to cause denial of service or crash RTKLIB rovers and CORS servers.